| No TPTP formula. May not be expressible in strict first order. | Languages.kif 14705-14709 |
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| No TPTP formula. May not be expressible in strict first order. | Merge.kif 1446-1446 | 子類 HumanLanguage and Language |
| No TPTP formula. May not be expressible in strict first order. | Merge.kif 1460-1460 | 子類 ConstructedLanguage and HumanLanguage |
| No TPTP formula. May not be expressible in strict first order. | Merge.kif 1477-1477 | 子類 NaturalLanguage and HumanLanguage |
| No TPTP formula. May not be expressible in strict first order. | Merge.kif 1485-1485 | 子類 手動人類語言 and HumanLanguage |
| No TPTP formula. May not be expressible in strict first order. | Merge.kif 1491-1491 | 子類 口語人類語言 and HumanLanguage |
| No TPTP formula. May not be expressible in strict first order. | Merge.kif 1508-1508 | 子類 WrittenHumanLanguage and HumanLanguage |
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